Column-top mold.



Wn M, YBHABLE. COLUMN TOPAMOLD. xlmmmlrnm ocT. 9, 1912.

Patented Feb. 28, 1915..

I N VEN TOR.

WITNESSES:

W. M. VBNABMEx COLUMN i0? MCL@ APPLIGATION FILED OCT. 9, 1912.

atented Feb. 23, 1915.

2 SHEETS-SHEET 2.

WM y@ @ad /l vio Willi-LU@ VENABLE. GF PITTSBURGH, PENNSYLVANIA, ASSIGNOB TO BLAW STEEL SQNSTRUCTGN N JERSEY.

COMPANY, 0F FITTSBRGH, PENNSYLVANIA, A. CORPORATION 0F COLUMN-T02 MOLD.

Specification of Letters Patent. Patented Reb. 23, 1915.

appuauon slee october e, i912. serial no. 724,725.

To @Z310/icm if 'may concern Be it lrnouf'n that I, WJLLIAM Maro VpnaeLi-i, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State oi Pennsylvania, have invented certain new and useful Improvements in )olumn-Top Molds, of which the following 1s a spcoiiication.

The invention relates to molds .or formel for molding the tops of concrete columns, and has 'for its primary objects; the provi- 'sion of a column top mold having a plurality lof sides which can be readily adjusted for columns of varying diameter; the provision of a column mold having a plurality of sides in which the bottom diameter of vthe form may be adjusted Without varying the top ddameter, and in which the form remains symmetrical through all its various adjustments; the provision of a column top which can be cheaply and easily constructed from sheet metal and which shall be ci very rigid form when assembled; the provision of a column top mold presenting a smooth inte'- rior adapted to forni a surface free from marks due to astenings; and the' 'provision of improved connecting means for use between the column top forni and the cylindrical form for the body 0I" the column. Cer- .tain embodiments of the invention are illustrated in' Wherein- Figure 1 is a vertical two-part section through my improved mold or form, one half of the section showing the mold expanded to its largest size, and the other half of the section showing the mold reduced to its smallest size; Fig. 2 is a two-part plan vieuY of the structure shown in Fig 1 Fig. B is a plan view of one of the pl ty of similar plates employed, before such plate the accompanying drawings,

has been bent to the form in lwhich it is` used; Fig. is an edge view of the plate of Fig. 3; Figs. and 6 are Ulan and edge news respectively 'of the plate of F 3 after it has been bent to the form in which ltj in the mold; Fig. 7 is a section on the Il of Fig. 5; Fig. 8 is a plan connecting ring employed, and i side elevation of one ot the halves "inenting ring shown in vFig. 8.

stated, the mold consists of a plusimilar tapering sheet metal plates g one of its side edges bent bankward to lfm-in a securing flange, and the is used line the form in which it is other side edge, overlapping the flange of the adjoining plate, holes being provided in the edges of the plate not having the flanges7 so that an adjustment as to'size maybe secured. The lower end of the form thus constructed is secured' detachably to ,the top of a column form by means of a collar, portion of the mold is/finished oli by means of another collar of fixed diameter and having its sides formed to fit the series olf/plates constitutingthe mold. By the use of this upper collar the top diameter of the mold is maintained constant, shifted up and down as the plates areadjusted in or out, in order to vary the'size of the lower-end of the mold.

Referring to Figs. 1 and 2, which views show von one side the mold .adjusted to its largest diameter, and on the other 'side the mold adjusted to its smallest diameter, l, 1, 1, etc. are the plates from which the body of the mold is built up; 2 is the bottom col` lar serving to connect the body of the mold with the upper end of a cylindrical column mold 3; 4 is the top or other collar of xe'd a plurality of rows ofl such collar being while the upper diameter secured to the 'upper interior surface of the body of the mold, `and 5 is the A flooring into which .the upper edge of the be'4 understood that the number. of sides may bevaried vwithout departing from the in-V vention.

Figs. 3 and 4 illustrate one of the platesy 1 as yit is cut out, but before being .bent into used in'the mold. The plate is provided adjacent one edge with the single row of holes/6; nd adjacent the other edgervitfhhe plneltfof rowsof holes 7 8, ej/id l0, the number of rows of holes depen/ling upon thenumber of adjustments'desired. The upper-edge of the plate is also provided with a series vof rows of holes l1, 12, 13, andlfl, to provide :for the vertical adjustment of thecollar 4 tov cor-v respond with` the other adjustments of the various plates. ln order to form the plate of Figs. 3 and 4 in'to'the shape in which it is to be used, it is bent-along the 'dotted lines l5 and 16 to form the ilanges 17 and 18, as indicated body of the plates also being bent to the contour as indicated in Fig. 6. By refsides top, but itv will in Figs. 5, 6,' and 7, the

erence to Figs. 1 and` 2 it will be seen that when the plates are assembled the flange 17 on'one plate overlaps lthe .edge ofthe next plate, and that the parts `.secured together' by means of .ordinary stovebolts 19. By shifting 'the flanges 17 so that the holes therein register with the various rows of holes 7, 8, 9,fand310,-thie` diameterof the mold' at its lower Vend may be adjusted to correspond with yarious diameters of columns, the range of adjustment being apparent from an inspection of Figs. l'and 2 in,y

which one half ofthe mold is shown adjusted toits largest diameter and the other half of the mold adjusted to its least diameter. 1

IThe c'ollar 4 which completes the upper portion of the'mol'd`l is'made preferably of sheet metal, .and is'provided at its lower edge'with a flange 20 for engaging the interior surfaces of the plates 1 and at its upper edge is provided with an angle 21 for bearing against the under surface of the flooringI 5. This collar l remains-always the same in size regardless of the adjustments of the -plates 1, as will be readily understood from an inspection of Fig. 1; To compensate for the changes in the inward diameter of the portion of the -mold formed by the plates l,"however, the collar must be moved -vertically alongthe interior surface of the vform as thev'plates 1 are adjusted. This vertical adjustment of the collar 4 upon the interior surface of the plate 1 is provided for by means of the series of holes 11,12, 13, and 14. The collar is preferably held in" any desired position of adjustment' by means of the stove bolts 22 which pass through'tlie perforations in the flange of the collar and in the plates l. It will be seen that by this arrangement the top diameter of the column head as measured at the collar @always remains the same, while the Alower diameter may be varied to suit the diameter of column with which the column head is used. It Willvalso be seen that the portions of the plates in use in their varie,

. ousposit-ions of adjustment always remain symmetrical, that the surface presented by the inside of4 theiform' is smooth, and that the securing means vbetween the overlapping flanges are readily accessible in 4the operation of assembling andv disassembling the parts.

As indicated in Figs. 8 and-9, the ring 2 for use at the bottom of the mold is made in two sections held together by means of the bolts V23, thus clamping ring' orc'ollar over the upper end 3 of the column mold. The

upper'edge 24 of the collar is secured to theA ange 1S at the. bottom of theplatesl', by

means of bolts (not shown); =As indicatedv in Fig. 8, theupper interior portion of the' ring '2 is shaped to conform in' configuration with the interior shape of the lower end of the column head mold, while the lower inT terior portion of thexringis cylindrical to t the cylindrical upper end of the column mold 3. The' method of operating the mold and the advantages incident thereto will be readily apparent to those skilled in the art. When the cross section of the column with which the column top lis to be used is not round, but is angular 'and corresponds in the number of sides with the number of sides.

of the column top, the transition ring or. collar 2 is of course unnecessary.

Having thus described my invention and' illustrated its use, ywhat I claim as new and* desire to secure .by Letters Pat/ent, is the following.

" In combination in a column head mold,

va plurality of similar tapering'plates each having,r one side edge bent backward atan angle to form a securing` Harige and provided with holes, and having the other side edge lying in the plane of the body ofthe plate and overlapping the side-edge of the adjoining plate, the siii@ other side-edge of each plate havingr a plurality of sets of holes arranged-in rows paralleling the edge,

and securing means' adapted through the said holes.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses. f

' l WILLIAM M. VENABLE. -Witnessesz- LE'rrrrA A. M'Ynns, y ARCHWQMH MARTIN'.

to extend .l 

